We propose a tunable resonant narrow-band optical filter based on a two-dimensional grating on the top of a stack of
dielectric layers including a layer of electro-optic (E-O) material, and demonstrate numerical results of the tunability. The
structure is periodic in two orthogonal directions and the basic pattern is designed in order to increase the angular tolerance
of the filter. The LiNbO3 and BaTiO3 were chosen due to their strong electro-optical properties. When an external
electric field is applied on the E-O material layer, a displacement of the resonant peak in the spectra is observed. We have
chosen the orientation of each E-O crystal so that the external electric field is applied in the direction corresponding to the
greatest E-O coefficient.
KEYWORDS: Signal to noise ratio, Optical networks, Switches, Packet switching, Control systems, Interference (communication), Fiber couplers, Networks, Signal attenuation
In this paper, a novel all optical buffer based on cascaded double-loop all optical buffer (DLOB) unites is
proposed and demonstrated experimentally with the SNR analyze. This buffer is compact, simple, and inherently stable,
the delay can be adjusted in the range of 0 to 250us. By injecting a synchronizing control pulse, the operation of reading
and writing can be realized easily and the switch time is up to 20ps. The new optical buffer can be used in optical routers to
solve the packets contention.
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